On our Windows 2012R2 and Windows 2016 RDS / Citrix servers, we had a strange issue. Users who were starting a new session could witness one (or all) of the following issues:
- The infamous black screen while logging in;
- Citrix WEM (Workspace Environment Manager) splash screen hanging on Citrix WEM processing filter conditions;
- The Windows start menu doesn’t work (right mouse click works).
This issue could act up within an hour or after a couple of days.